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Accounts Receivable (Schedule of Accounts Receivable) (Details) - USD ($) $ in Millions | Jun. 30, 2017 | Dec. 31, 2016
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Accounts Receivable, Net, Current [Abstract] |  |
Utility Customer Receivables | $ 56.2 | $ 15.3
Contract Services Customer Receivables | 4.4 | 4.6
Accounts Receivable, Net | $ 60.6 | $ 19.9

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- Definition Contract Services Customer Receivables + References No definition available. + Details
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Namespace Prefix: | leu_
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Balance Type: | debit
Period Type: | instant

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- Definition Utility Customer Receivables + References No definition available. + Details
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Balance Type: | debit
Period Type: | instant

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- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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